Avery Dennison ALX 720 - Manual (Page 19)

Operators Manual
ALX 720
4/09 Page 19 Preparing the machine
Sensor signals
Label sensor LPIT
real leading
edge of label
Figure 6 Definition of LPIT
Manual adjustment of the CONT parameter
y
Remove a label from the backing paper and slide it inside the sensor.
y
Reduce the value with the PRIOR key until the LED switched on.
y
Press the key NEXT until the LED switched off. If there are marks on the backing paper do
the measurement on this position.
y
Note the value GAP xxx
y
Slide the backing paper including label inside the sensor. Use the lightest position on the
label for the adjustment.
y
Increase with the NEXT key the value until LED lights again. Note the second value GAP
yyy
y
Calculate the contrast value by the formula (xxx + yyy) / 2 and set it.
y
Manual adjustment is completed.
With a difference of less than 20 an operation with this kind of sensor is not possible
(sometimes two or more labels are dispensed).
3.2.3 Label guide
On some of the axles there are guiding clamps. Adjust the clamps near the machine so all have
the same distance to the front plate (31.5 mm). The outer clamps should be mounted that the
guide but not bend the label material.
The front of the dispensing edge has a rot, which can be adjusted for straighten the material
guiding. Switch the printer to OFF and spend several labels by pressing the dispenser FEED
key. If the material guiding is running out of the guiding way, adjust the rot by loosing two
screws at the dispensing edge.